US9095450B2 - Insertion instrument for anteriorly inserting intervertebral spinal implants - Google Patents
Insertion instrument for anteriorly inserting intervertebral spinal implants Download PDFInfo
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- US9095450B2 US9095450B2 US12/343,775 US34377508A US9095450B2 US 9095450 B2 US9095450 B2 US 9095450B2 US 34377508 A US34377508 A US 34377508A US 9095450 B2 US9095450 B2 US 9095450B2
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- shaft
- inserter
- threadform
- blades
- distal end
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/4465—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
-
- A61F2002/4475—
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4622—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof having the shape of a forceps or a clamp
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4625—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use
- A61F2002/4627—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof with relative movement between parts of the instrument during use with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
Definitions
- U.S. Pat. No. 3,486,505 discloses an instrument to distract two closely adjacent vertebral bodies and at the same time insert an implant between the distracted vertebral bodies.
- the instrument acts as a protective guide and channel to the inserted implant and at the same time acts as a protective retractor to adjacent soft tissues.
- US Published Patent Application No. US 2005/0165408 discloses an instrument for inserting an implant in a space between adjacent bony portions including upper and lower guide members separated by a spreader with the implant positioned forwardly of the spreader.
- the spreader is movable forwardly between the guide members with a drive member to position the implant in a space between the bony portions.
- the spreader contacts the adjacent bony portions to facilitate withdrawal of the inserter instrument when the implant is positioned in the space.
- This Inserter Assembly is comprised of two long rigid blades (or ramps) that are pivotably connected at a (variable) distance apart.
- the distal blade tips can be placed into the disc space, while an inserter shaft can be advanced between the blades and towards the distal blade tips.
- a pusher block on the end of the inserter shaft can thereby advance the implant towards the blade tips and into the intervertebral body disc space.
- Advancing the inserter shaft and pusher block serves to spread the blades apart and to open the disc space for placement of the implant.
- the blades can also be used as a spreader by virtue of their pivot point, as the surgeon squeezes the blade handles to provide additional distraction of the disc space.
- the DePuy Spine Keystone Blades are described in the Technique Guide for the Keystone Graft Instruments.
- the blade tips are inserted into an intervertebral body disc space, and an implant can be pushed distally into the disc space by means of an inserter shaft which holds the graft.
- Impaction of the graft implant serves to spread the ramps apart as the implant is advanced into the disc space.
- the implant can be pushed distally towards the disc space by means of a pusher, while Impaction of the graft serves to spread the ramps apart.
- the ramps are them removed by rocking and pulling them out while leaving the implant in place.
- the current invention seeks to provide an instrument which can deliver an implant into the anterior spine, while also providing some additional features that address certain of the limitations of the existing methods and devices.
- a vertebral body implant inserter comprising:
- a vertebral body implant inserter comprising:
- Advantages of the present invention include: providing the ability to distract; protecting the implant from contact with tissue during delivery; controlling the motion of the implant during delivery and allowing impaction of the implant; providing smooth delivery of the implant; controlling the motion of the blades after delivery; and providing a means for extracting the instrument after implant delivery.
- FIG. 1 discloses a perspective view of the inserter of the present invention.
- FIG. 2 discloses a magnified view of the bracket-blade assembly of FIG. 1 .
- FIG. 3 discloses a side view of the inserter of the present invention, wherein the bracket is biased closed.
- FIG. 4 discloses a perspective view of another embodiment of the inserter of the present invention, wherein the bracket is spring-loaded.
- FIG. 5 discloses a perspective view of another embodiment of the inserter of the present invention, wherein the bracket comprises a centering linkage.
- FIG. 6 discloses a perspective view of a blade of the present invention.
- FIGS. 7 a - 7 c disclose side and top views of the inserter of the present invention, wherein the blades have proximally extending handle extensions, along with a perspective view of a blade with a handle extension.
- FIG. 8 discloses a side view of a blade having a distally narrowing tip and a vertebral stop.
- FIGS. 9 a - c disclose various views of a blade of the present invention having a first embodiment of a sliding pusher bracket.
- FIGS. 10 a through d disclose various views of blades of the present invention associated with a second embodiment of a sliding pusher bracket.
- FIGS. 11 a - 11 c disclose various views of a first embodiment of a shaft-pusher rod design.
- FIGS. 12 a - 12 c disclose various views of a variation of a first embodiment of a shaft-pusher rod design.
- FIGS. 13 a - 13 c disclose various views of a second embodiment of a shaft-pusher rod design.
- FIGS. 14 a - 14 c disclose various views of a third embodiment of a shaft-pusher rod design.
- a vertebral body implant inserter comprising:
- each end portion 15 of the bracket may form a pair of prongs 51 that form a clip for detachable release of the blades.
- the intermediate portion of the bracket assembly includes a second longitudinal throughbore therethrough 53 , which allows a shaft to fit through; and the shaft can be used to urge or push the implant forward.
- the shaft may be threaded through the bracket assembly to advance the implant by threading; or it may allow impaction through the bracket assembly to advance the implant; or it may allow both functions, as desired.
- the bracket is biased closed.
- the bracket assembly may also include a handle portion (not shown), extending proximally from the first and second endportions or base portions 25 of the bracket, by which to grasp the instrument.
- the bracket assembly could have a spring-loaded actuator 55 rather than made as one continuous spring member.
- the bracket assembly could have a centering linkage 57 attached to the central body.
- FIG. 5 also shows the first longitudinal throughbore 58 of the central body.
- the blades of the present invention can be fairly rigid, but connected via a flexible hinge point and biased in the closed direction.
- the blades are easily and independently removable, but push against each other to hold the implant.
- the blades do not have uniform width but rather may become wider at their distal tips 23 where they spread the bones apart. That is, each blade further has an intermediate portion 24 , and wherein the distal end portion 23 has a width that is greater than a width of the intermediate portion 24 .
- the blades can provide distraction, and tactile feedback, by virtue of their rigidity and their pivoting.
- the blades are easily removable, such that different blades can be used for different applications or implants; and they can contain grooves 59 on the inside surface 61 to keep the implant centered during insertion. Alternatively, they can contain raised ridges (not shown) on the inside surface 61 to keep the implant (which would have a corresponding groove) centered during insertion. In one preferred embodiment, in which the blade has a central raised ridge, the implant is an ALIF implant having a corresponding central groove.
- the blades of the present invention can also include handle extensions 63 that extend proximally from the base portion 25 , which can be used for grasping the instrument. These extended handles can replace the fixed handle on the bracket discussed above. More importantly, the blade's handle extensions 63 can be used to provide distraction when desired, whereby squeezing the handle extensions causes the blades to pivot about the flexible bracket component. Furthermore, as the implant is advanced—and the blade tips move apart—the blade handle extensions will provide some tactile feedback as they angulate toward each other.
- the blades can be constrained to be “centered” about the central axis or plane of the bracket assembly, such that they must open and close together, or symmetrically about the central body.
- the blades themselves can have a certain amount of inherent flexibility, which may be controlled by their thickness and width.
- the tips 65 of the blades can have a non-uniform thickness—so that they are thinner at the very ends where they contact each other. This narrowing taper on tip 65 allows them to fit into a narrower space when they are brought together (i.e. closed).
- each blade has at least one tooth 66 extending transversely from its outer surface 76 and distal to the vertebral stop 75 . These teeth help anchor the blade in the vertebral body.
- each blade has a slot 67 therethrough to help guide the implant.
- the blades do not possess the slot, but rather has a substantially planar inner surface 61 .
- the present invention also provides a mechanism to push the blades out of the interbody space, without needing a slot in the blades.
- the inserter may possess a sliding pusher-bracket 69 , which bears against the implant between the blades.
- Each pusher bracket has an annular ring 71 that wraps around the blade and a vertebral stop, or fin, 73 protruding from the ring to contact the vertebral body. As shown in FIGS.
- the sliding pusher bracket contains a central outer keel (or fin) for pushing against the vertebral body, and the bracket also wraps around the blades rather than having a keel which extends through a central slot in the blades. In this way, the device can push the blades out of the interbody space as the sliding pusher bracket is driven forward by the pusher block—without the need for a slot in the blades.
- the pushing rod-bracket concept disclosed herein may also eliminate the need for various sizes of conventional pusher blocks.
- the blades of the present invention are pivotally mounted. In other embodiments, the blades of the present invention are flexibly mounted.
- the shaft may be cannulated to allow a pushing rod 41 to pass through the middle of it, whereby the distal end 43 of the pushing rod may contain a pusher block 45 .
- the pusher block can bear against the implant, to push it forward.
- Advancing the shaft (which may be threaded) can advance the pushing rod and its pusher block, which in turn advances the implant forward.
- the pushing rod can slide back and forth within the shaft, allowing the back of the pushing rod to be directly impacted forward for some distance.
- the shaft can subsequently be advanced until it once again bears against a portion the pushing rod and/or pusher block, so that it can resume pushing the implant forward.
- the shaft has an outer surface having a first threadform thereon, and the throughbore of the central body has a second threadform, wherein the first threadform or set of teeth of the shaft mates or engages with the second threadform within the throughbore.
- the device of the present invention having a cannulated threaded shaft 101 , with an inner push rod 103 that is smooth sliding.
- the outer shaft 101 has threads 102 , and it can thread forward or backward within the central body.
- the inner push rod 103 is smooth, and it can slide back or be pushed (or impacted) forward, within the outer shaft.
- the pushing rod can also have a plurality of teeth, such that it can “ratchet” forward when impacted, but not slide backward when the forward force is absent. “Ratcheting” forward of the pushing rod within the outer shaft allows forward sliding or impaction, with no sliding backward; but this still allows threading forward or backward with the outer shaft.
- the device of the present invention having a cannulated threaded shaft 105 , with an inner push rod 107 having ratchet teeth.
- the outer shaft 105 is threaded, and it can thread forward or backward within the central body.
- the inner push rod 107 has ratchet teeth 108 , and it can slide (or else ratchet forward only) within the outer shaft. It can have both an engaged mode and a free-sliding mode.
- the shaft can have ratchet teeth (instead of a thread, for advancing the shaft. Therefore, in some embodiments, the outer shaft has an outer surface having a set of teeth thereon, and the throughbore of the central body has a second threadform, wherein the first threadform or set of teeth of the shaft mates or engages with the teeth within the throughbore.
- the device of the present invention having a cannulated shaft 111 having ratchet teeth 112 and containing a threaded inner push rod.
- the outer shaft 111 has ratchet teeth 112 and it can slide (or else ratchet forward), within the central body. It can have both an engaged and a free-sliding mode.
- the inner push rod 113 has threads 114 , and it can thread forward or backward within the outer shaft.
- the shaft can have ratchet teeth intergrated within the thread for advancing the shaft
- the threadform can have a “saw-tooth” shape, such that the threads also function as ratchet teeth, allowing the shaft to slide or ratchet forward, while also threading back and forth.
- the device of the present invention having a threaded inserter shaft 121 having a helical threadform 122 with angled ratcheting teeth.
- the threaded inserter shaft has ratcheting thread teeth, 127 and the teeth in the central body can be angled and movable apart, to allow the shaft to slide—or ratchet-forward (only) within the central body, due to the helical threadform on the shaft.
- the shaft can also thread forward or backward within the central body.
- the inserter shaft is threaded, such that it can thread forward or backward within the central body. But the thread teeth are also angled ratchet teeth, such that the shaft can also slide or ratchet forward.
- the blades 123 are flexibly coupled to the central body via a flexible bracket.
- the pusher block 125 is rotatably coupled to the ratcheting threaded shaft.
- the inserter further comprises: a pushing rod disposed within the cannula, wherein the pushing rod has a distal end forming a pusher block, and wherein the pusher block pushes the pair of sliding pusher brackets.
- an embodiment may have a central shaft whose threadform contains teeth which can not only be threadably advanced but also can ratched forward within the central body. In this way, “ratcheting” forward of the shaft allows forward sliding or impaction, with no sliding backward; but this feature still allows threading forward or backward with the outer shaft.
- the inserter of the present invention can operate to allow the blades to automatically retract from the spine when fins on said pusher blocks make contact with the vertebral body.
- the pusher block 45 of FIG. 4 may contain corresponding vertebral stops 46 , which stop the forward motion of the implant, such that subsequent actuation of the device serves to push the blades rear-ward relative to the implant and out of the spine.
- FIG. 8 there is a vertebral stop 75 extending from the outer surface 76 of each distal end portion of each blade; and these stops limit the forward position of the blades.
- the pusher block 45 of FIG. 4 may contain corresponding vertebral stops 46 , which stop the forward motion of the implant, such that subsequent actuation of the device serves to push the blades rear-ward relative to the implant and out of the spine.
- the sliding pusher brackets 69 could also have such vertebral stops 73 located on the outside surfaces of the blades (which as in FIG. 6 may be narrower in the middle and wider at the tips. Such stops 73 could also protrude forward of their attachment point to the rest of the sliding bracket, so the blade tips can remain wider than the width between the fins where the pusher bracket wraps around the blade.
- each blade can have a sliding pusher-bracket which bears against or advances the implant—which is between the blades—and then also contacts the vertebral body on the “outside” of the two blades. This eliminates the need to interrupt the blades with grooves or slots, since each sliding pusher-bracket can fit onto the outside of the blade on which it slides.
- the sliding pusher bracket assembly 85 comprises a pair of annular rings 87 that wrap around the respective blades, each having a central band 89 that connects the two annular rings with a slot 91 extending along the band, and a fin 95 attached to the respective rings that act as vertebral stops, and a central pusher 93 slidably attached to the slot in the band.
- FIG. 10 b there is provided the pair of blades and partial sliding pusher bracket of FIG. 10 a , wherein the lower blade, ring and fin have been removed in order to provide a more clear picture of the central band 89 that connects the annular rings and the slot 91 extending along the band.
- FIG. 10 c there is provided an additional view of the pair of blades of the present invention showing a partial sliding pusher bracket therebetween, wherein the central band of the bracket includes a pin 97 extending transversely from the band.
- the pusher (not shown) can have a corresponding through-hole in which the pin 97 can ride, thereby providing sliding movement in a direction transverse to the blades.
- FIG. 10 d there is provided a pair of blades of the present invention having the second embodiment of a sliding pusher bracket therebetween, wherein distal 98 , intermediate 99 and proximal 100 portions of the blades are also shown.
- the present invention is preferably used for anteriorly inserting intervertebral spinal implants, it may also be used for either posteriorly, laterally, posterolaterally or anterolaterally inserting intervertebral spinal implants as well.
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- Health & Medical Sciences (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
Description
-
- a) a elongated central body having a distal end, a proximal end, an outer surface, a longitudinal throughbore therethrough, and a pair of spring members (such as leaf springs) extending from the outer surface,
- b) a pair of blades having a distal end portion and a proximal end portion, the proximal end portion of each blade detachably coupled to a respective spring member,
- c) a shaft slidable within the throughbore, the shaft having an outer surface having a threadform thereon.
-
- a) a elongated central body having a distal end, a proximal end, an outer surface, a first longitudinal throughbore therethrough,
- b) a bracket having i) an intermediate portion having a second longitudinal throughbore therethrough, ii) a first endportion, and iii) a second endportion, each endportion forming a spring member (such as a leaf spring), the intermediate portion contacting the distal end of the central body so that the first longitudinal throughbore aligns with the second longitudinal throughbore,
- c) a pair of blades having a distal end portion and a proximal end portion, the proximal end portion of each blade detachably coupled to a respective spring member,
- d) a shaft slidably advanceable within the first longitudinal throughbore, the shaft having an outer surface having a threadform thereon.
-
- a) an elongated
central body 1 having adistal end 3, aproximal end 5, anouter surface 7, a first longitudinal throughbore therethrough (not shown), - b) a
bracket 11 having i) anintermediate portion 13 having a second longitudinal throughbore therethrough (not shown), ii) afirst endportion 15, and iii) asecond endportion 17, each endportion forming aleaf spring 19, the intermediate portion contacting the distal end of the central body so that the first longitudinal throughbore aligns with the second longitudinal throughbore, - c) a pair of
blades 21 having adistal end portion 23 and abase portion 25, the base portion of each blade detachably coupled to a respective leaf spring, - d) a cannulated
outer shaft 31 slidable within first longitudinal throughbore, the shaft having anouter surface 33 having afirst threadform 35 thereon that mates with a second threadform or teeth (not shown) within the first longitudinal throughbore of the central body and aproximal end 37 forming afirst handle 39, and - e) a pushing
rod 41 slidable within the cannula of the shaft, the rod having adistal end 43 forming apusher block 45 and aproximal end 47 forming asecond handle 49.
- a) an elongated
Claims (31)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/343,775 US9095450B2 (en) | 2008-12-24 | 2008-12-24 | Insertion instrument for anteriorly inserting intervertebral spinal implants |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US12/343,775 US9095450B2 (en) | 2008-12-24 | 2008-12-24 | Insertion instrument for anteriorly inserting intervertebral spinal implants |
Publications (2)
Publication Number | Publication Date |
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US20100160983A1 US20100160983A1 (en) | 2010-06-24 |
US9095450B2 true US9095450B2 (en) | 2015-08-04 |
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US12/343,775 Active 2032-04-28 US9095450B2 (en) | 2008-12-24 | 2008-12-24 | Insertion instrument for anteriorly inserting intervertebral spinal implants |
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US (1) | US9095450B2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8500749B2 (en) * | 2011-04-19 | 2013-08-06 | Prescient Surgical Designs, Llc | Apparatus and method for inserting intervertebral implants |
US9358124B2 (en) | 2012-02-29 | 2016-06-07 | Globus Medical, Inc. | Implant inserter |
US9186263B2 (en) * | 2012-02-29 | 2015-11-17 | Globus Medical, Inc. | Implant inserter |
WO2015157768A1 (en) * | 2014-04-11 | 2015-10-15 | Microvention, Inc. | Implant delivery system |
US10143567B2 (en) * | 2015-09-23 | 2018-12-04 | Alphatec Spine, Inc. | Implants and guides for inserting an implant |
US10729554B2 (en) * | 2015-10-09 | 2020-08-04 | DePuy Synthes Products, Inc. | Expandable trials |
US10905566B2 (en) * | 2018-02-05 | 2021-02-02 | Spineology Inc. | Percutaneous posterior implant slide |
US11452617B2 (en) * | 2019-09-09 | 2022-09-27 | Integrity Implants Inc. | Dynamic expanding pathway cannula |
Citations (22)
Publication number | Priority date | Publication date | Assignee | Title |
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US3486505A (en) | 1967-05-22 | 1969-12-30 | Gordon M Morrison | Orthopedic surgical instrument |
US5258007A (en) * | 1992-05-14 | 1993-11-02 | Robert F. Spetzler | Powered surgical instrument |
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